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Ortho > Exam II Material Dr. Pruzansky Growth and Dev 2 > Flashcards

Exam II Material Dr. Pruzansky Growth and Dev 2 Flashcards

1
Q

Girls reach PHV ___ years before boys (__ and ___ years)

A

2 year…12 and 14 years

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2
Q

Timing of PHV is closely linked to ________ patterns in WHICH two areas??

A

calcification….hand (Hand wrist films) and changes in the shape of cervical vertebrae (cervical vertebrae maturity scale).

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3
Q

What is the most accurate radiograph to assess growth?

A

hand wrist film

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4
Q

Late growth of the _______ CAN occur in the late teenage years or early adulthood..Most often seen in ______, especially those with ______ mandibles

A

mandible…males…prognathic

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5
Q

Mandibular growth can cause incisor crowding when there is limited ______…

A

overjet

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6
Q

Mandibular growth..A patient can “______” their orthodontic treatment

A

out grow

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7
Q

Soft tissue profile ______ with age and growth

A

flattens

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8
Q

A blow to the mandible on one side may fracture the mandible at the condylar process on the _______ side

A

OPPOSITE!!!!

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9
Q

Trauma: Pull of WHICH MUSCLE distracts the condylar fragment and resorption may occur

A

lateral pterygoid

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10
Q

Trauma: Growth is restricted on WHICH SIDE leading to mandibular asymmetric growth?

A

the side of the fracture

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11
Q

What is the post fertilization time frame for the formation of cleft lip and/or palate?

A

28-38 days

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12
Q

What is the post fertilization time frame for the formation of ONLY cleft palate (lip has already formed by now…)

A

42-55 days

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13
Q

Hemifacial Microsomia is primarily UNILATERAL and ALWAYS _________

A

asymmetrical

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14
Q

Which craniofacial deformity is a product of the 1st and 2nd branchial arches?

A

Hemifacial Microsomia

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15
Q

Which craniofacial deformity is a product of the 1st and 2nd pharyngeal arch, groove and pouch?

A

treacher collins (mandibulofacial dystosis)

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16
Q

Treacher Collins is typically ______ but may not be symmetric, ____ deformities may be present

A

BILATERAL….ear

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17
Q

What is the MOST COMMON congential defect involving the face and jaws?

A

Cleft lip/cleft palate

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18
Q

Cleft lip: failure of fusion between ___________ and the _________ (__th week of development)

A

median and lateral nasal processes…maxillary prominence..6th

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19
Q

In cleft lip/palate: _________ due to post-surgical scar tissue

A

Maxillary retrognathism

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20
Q

In cleft lip/palate: Often see a notch in the ______ process…Missing lateral incisors, bony defects, etc.

A

alveolar

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21
Q

____% of cleft lip patients also have cleft palate

A

60%

22
Q

Cleft palate only: incomplete fusion of _________…May have _______

A

secondary palate…bifid uvula

23
Q

Craniosynostosis Syndromes: ______ rather than ________ stage of development

A

fetal…..embryologic

24
Q

What is the most common Craniosynostosis Syndrome?

A

Crouzon’s syndrome

25
Q

What is the developmental abnormality that allows a person to touch their shoulders together?

A

cleidocranial dysplasia (CLEIDO=CLAVICAL)

26
Q

What is cleidocranial dysplasia a defect in?

A

defect in BONE RESORPTION

27
Q

What are two oral manifestatoins of cleidocranial dysplasia?

A

heavy fibrous gingiva and SUPERNUMERARY teeth

28
Q

Change in size between primaries and perms: Maxillary permanent incisors are about __ mm larger than the primary incisors…this is regained by ________ & increase in intercanine width

A

8mm…proclination

29
Q

Change in size between primaries and perms: Mandibular permanent incisors are about __-__ mm larger than the permanent incisors…this is regained by increase in _______

A

5-6mm…intercanine width

30
Q

What is the primate space on the maxillary? How many mm?

A

between max lateral incisors and canines (1.7mm)

31
Q

What is the primate space on the mandibular? How many mm?

A

between mandibular canines and 1st molars (1.5mm)

32
Q

Early mesial shift is migration of the erupting _______ and it uses which primate space? What age does this occur?

A

erupting mandibular permanent 1st molar…mandibular primate space (canine and 1st molar)…age 6

33
Q

Leeway space is the space occupied by the primary _______ and _______ often GREATER than the succedaneous teeth

A

canines and molars

34
Q

What is the Leeway space in each maxillary quadrant?

A

1-1.5mm in each maxillary quad

35
Q

What is the Leeway space in each mandibular quadrant?

A

2-2.5mm

36
Q

Which tooth is the greatest contributor to leeway space? How much space does it provide?

A

primary 2nd molar..2mm

37
Q

About 2mm of the leeway space is used up by _______ of the permanent molar

A

mesial drift

38
Q

What is the number one way we try and preserve mandibular leeway space?

A

a lower lingual holding arch

39
Q

LATE mesial shift: Mesial migration of the erupting WHICH TOOTH? after the loss of WHICH TOOTH?

A

mandibular permanent first molar…primary second molar

40
Q

LATE mesial shift uses leeway space and it around age ___

A

11

41
Q

A distal step: happens __% of the time and is a class __ occlusal relationship

A

10%…class II (the distal step is from the distal of the mand molar up to the distal of the max second molar)

42
Q

A flush terminal plane occurs __% of the time and is “_____” occlusal relationship

A

30%…“end to end”

43
Q

A mesial step is occurs __% of the time and IF its less than ___mm it will end up being Class __ 80 % of the time…if greater than this it will end up Class ___ the remaining 20% of the time

A

60%…2mm…Class I…Class III (the mesial step is down from the distal of the second maxillary molar to the distal of the second mand molar)

44
Q

Once bone is formed, it grows by:

A

appositional growth only

45
Q

In predicting the time of the pubertal growth spurt, while treating jaw malrelationships in a growing child, the orthodontist can get the most information from:

A

Hand-wrist radiograph

46
Q

Cartilage differs from bone in that cartilage can increase in size by:

A

Interstitial growth

47
Q

Bone deposition in the _________________ region is responsible for the lengthening of the maxillary arch.

A

tuberosity

48
Q

EACH STATEMENT T/F: Leeway space is a calculated difference between primary and permanent tooth size….There is typically more leeway space in the maxillary arch.

A

TRUE…FALSE

49
Q

Primary molar relationships are known as:

A

Step relationships

50
Q

In the maxillary arch, the primate space is located between the ______ and ______

A

lateral incisors and canines

51
Q

In the mandibular arch, the primate space is located between the ________ and _______

A

canines and first molars

Ortho (9 decks)

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